Chill-mold for pulleys



(N0 Model.) v F M 2 SheetsSheet 1. CHILL MOLD FOR PULLEYS.

No. 444,606. Patented Jan. 13, 1891.

ydc alfw 7 7%? wag.

(No Model.) F M AVIS 2 Sheets-Sheet 2. CHILL MOLD FOR PULLEYS.

dew/Z 07? Patented Jan. 13,1891.

mi NORRIS FETERB co, mom-1.1mm, WASHINGTON, o c.

UNITED STATEs PATENT OFFICE.

FRANCIS M. DAVIS, OF DENVER, COLORADO.

CHILL-MOLD FOR PU LLEYS.

SPECIFICATION forming part of Letters Patent No. 444,606, dated January 13, 1891.

Application filed December 30, 1889. Serial No. 335,313- (No model.)

To all whom, it may concern:

Be it known that I, FRANCIS M. DAVIS, of Denver, in the county of Arapahoe and State of Colorado, have invented a new and useful Improvementin Molds and Chills forPulleys; and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention is an improved chill, adapted particularly for casting sheaves such as used in cable roads for the support of the cable; but it will of course be understood that the invention may be used in connection with the casting of other forms of pulleys.

In the accompanying drawings, Figure 1 is a section through the mold, showing the chill and seat and the casting. Fig. 2 isa section of the chill-seat, chill, and sand for forming the face of the pulley. Fig. 3 is a section of the core-box, chill-seat, and chill; and Fig. 4 is a detail view of the pattern used in forming the mold. Fig. 5 is a vertical section of the upper and lower mold-sections after the pattern has been removed. Fig. 6 is a similar View of the two parts of the mold in place with the drill-seat in position ready to receive the metal.

In the drawings, A represents the chillseat, which is formed of an annular body portion having an open center, the walls being slightly tapering outwardly from the bottom. This seat has a flange a, projecting into the interior below the central line of the seat, and this flange supports the chill B, which is an annular ring fitting snugly against the interior periphery of the seat and having its inner periphery rounded, as shown, the con' vex surface thus formed making the corresponding concavity or groove in the peripl1- cry of the pulley formed in the mold. The upper and lower faces of the ring B are inclined rearwardly and form a bearing for the sand which is packed above and below the ring, the face of the sand inclining from the edge of the convex face of the ring B on each side toward the top and bottom, respectively, of the chill-seat, and the upper periphery of the pulley orsheave will of course conform to the shape of the sand and the interposed,

chill.

In Fig. 3 I have shown a stand 0 for supporting the chill-seat, and the conical-shaped sections D D are for the purpose of ramming or packing the sand on either side of the central chill B. The bottom section D has its lower part made flaring, and the space between it and the wall of the chill-seat is filled with sand. Around the upper part of the periphery of this section a concavity or groove 1) is formed, which is adapted to bear. upon the convexity of the chill B, and the upper section D is adapted to be placed upon the lower section and the two secured together by means of the screw Z) entering the threaded opening 0. A handle eallows the upper part to be manipulated. By this means the sand is rammed, and the flaring walls I) of the parts D and D leave the sand in a condition to form an exactly similar periphery on the pulley or sheave.

In forming the mold a two-part flask y, of Well-known form, is used, the upper and lower sections of sand A A being properlyformed, as in Fig. 5, by a pattern y, Fig. 4, which conforms in shape to the spindle 5 and the web 6 of the desired form of sheave or Wheel to be cast. The pattern has also a flange 10, the outside dimensions of which include the space covered by the chill-seat A, chill B, and flange of the sheave, (indicated between the points 1 2 3 4, Fig. 1.) After the two parts of the mold are formed by the pattern as in Fig. 5, it is removed, and the chill-seat A, with the chill B and the sand packed as in Fig. 2,

are put in place, as shown in Fig. 6, in the lower portion of the mold. The sand shown in Fig. 2 above and below the chill-seat having been packed by the plates D is held by the chill-seat. After said seat is put in place the upper section of the mold is positioned and the mold of Fig. 6 produced, ready to receive the metal.

I claim as my invention 1. In an apparatus for casting sheavepulleys, a chill-seat A, to be placed in the mold, an annular chill B, supported by said seat, extending inwardly about midway thereof to leave a space above and below within the seat for the sand, substantially as described.

2. In combination, the seat having an interior flange, and the movable chill B, supported by said flange and projecting inwardly In testimony whereofl have signed my name to this specification in the presence of two 10 subscribing witnesses.

FRANCIS M. DAVIS.

\Vitnesses:

W. C. DAVIS, F. W. BLooD. 

